Bundeswehr Institute of Microbiology, Munich, Germany.
Ticks Tick Borne Dis. 2012 Sep;3(4):227-31. doi: 10.1016/j.ttbdis.2012.04.001. Epub 2012 Jul 10.
Since the year 2005, clinical patterns resembling tick-borne rickettsioses have been noticed in Mongolia. Epidemiological data regarding species of the aetiological agent, tick vector, prevalence, and distribution as well as incidence of human cases throughout Mongolia are still sparse to date. In order to identify Rickettsia species occurring in Mongolia, we investigated Dermacentor nuttalli (n=179) and Ixodes persulcatus (n=374) collected in 4 selected provinces. Rickettsia raoultii was the predominant Rickettsia (82% prevalence) found in D. nuttalli and was also detected in I. persulcatus (0.8%). The Rickettsia prevalence in D. nuttalli from different provinces varied between 70% and 97%. In addition, R. sibirica was identified in approximately 4% of D. nuttalli, but solely from Arkhanghai province. The results of this study extend the common knowledge about the geographic distribution of R. raoultii and its high prevalence in D. nuttalli. Although the pathogenicity of this Rickettsia is still unclear, it should be considered in Mongolian patients suspected of having tick-borne rickettsiosis.
自 2005 年以来，蒙古已经注意到类似于蜱传立克次体病的临床模式。关于病原体、蜱媒介、流行率和分布以及蒙古各地人类病例发病率的流行病学数据至今仍然很少。为了确定在蒙古发生的立克次体种类，我们对从四个选定省份采集的 179 只革螨属蜱（Dermacentor nuttalli）和 374 只扇头蜱属蜱（Ixodes persulcatus）进行了调查。在革螨属蜱中，发现了主要的立克次体（82%的流行率）是拉乌尔立克次体（Rickettsia raoultii），在扇头蜱属蜱中也检测到了这种立克次体（0.8%）。不同省份革螨属蜱的立克次体流行率在 70%至 97%之间不等。此外，在革螨属蜱中还发现了大约 4%的西伯利亚立克次体（R. sibirica），但仅在阿尔泰省发现了这种立克次体。本研究的结果扩展了关于拉乌尔立克次体的地理分布及其在革螨属蜱中高流行率的普遍认识。尽管这种立克次体的致病性仍不清楚，但在怀疑患有蜱传立克次体病的蒙古患者中应考虑到这种立克次体。
